Hello Pedro – You are right to be able to use the Canada/Brazil agreement to qualify for a partial 13/40-OAS at the age of 65 or later, but help if/if a person is considered to be residing in Canada, regardless of the number of years spent of stay. The same information required to obtain a certificate of coverage from the United States is required to obtain a certificate of coverage from Canada or Quebec, except that you must present your Canadian Social Security Number instead of your U.S. Social Security Number. The Canadian government`s international social security conventions only cover age security and Canada pension plan benefits. If you contribute or have contributed to the PQ, but not to the CPP, please consult the Quebec pension plan. . . .